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Lintel Oct 25 - 31 25 questions
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Monday 25 October 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 65,000 in standard form

    Answer: 6.5 × 104
  2. 2. Algebra

    Factorise: x² - 2x - 80

    Answer: (x + 8)(x - 10)
  3. 3. Geometry

    Adjacent = 22cm, angle = 53°. Find opposite. Give your answer to 2 decimal places

    Answer: 29.19cm
  4. 4. Ratio

    Divide 65 in the ratio 1:1:3

    Answer: 13, 13 and 39
  5. 5. Statistics

    Calculate the mean of: 46, 41, 38, 39, 49, 21

    Answer: 39

Tuesday 26 October 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00019 in standard form

    Answer: 1.9 × 10-4
  2. 2. Algebra

    Factorise: x² + 4x - 5

    Answer: (x + 5)(x - 1)
  3. 3. Geometry

    Hypotenuse = 33cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 14.98cm
  4. 4. Ratio

    Simplify: 24:24:16

    Answer: 3:3:2
  5. 5. Statistics

    Calculate the mean of: 6, 11, 11, 24, 18, 22, 19, 47

    Answer: 19.75

Wednesday 27 October 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 32,000,000 in standard form

    Answer: 3.2 × 107
  2. 2. Algebra

    Factorise: x² - 5x - 84

    Answer: (x + 7)(x - 12)
  3. 3. Geometry

    Adjacent = 16cm, angle = 54°. Find opposite. Give your answer to 2 decimal places

    Answer: 22.02cm
  4. 4. Ratio

    Simplify: 6:10:12

    Answer: 3:5:6
  5. 5. Statistics

    The mean of 5 numbers is 28. If 4 of them are 17, 34, 18, 27, what is the missing number?

    Answer: 44

Thursday 28 October 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 25,000 in standard form

    Answer: 2.5 × 104
  2. 2. Algebra

    Factorise: x² + 22x + 120

    Answer: (x + 12)(x + 10)
  3. 3. Geometry

    Adjacent = 29cm, angle = 32°. Find opposite. Give your answer to 2 decimal places

    Answer: 18.12cm
  4. 4. Ratio

    Divide 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics

    The mean of 4 numbers is 31. If 3 of them are 30, 16, 17, what is the missing number?

    Answer: 61

Friday 29 October 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00075 in standard form

    Answer: 7.5 × 10-4
  2. 2. Algebra

    Factorise: x² + 9x - 10

    Answer: (x + 10)(x - 1)
  3. 3. Geometry

    Hypotenuse = 29cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 17.85cm
  4. 4. Ratio

    Simplify: 20:24:12

    Answer: 5:6:3
  5. 5. Statistics

    Calculate the mean of: 43, 12, 5, 42, 35, 33, 28. Give your answer to 2 decimal places

    Answer: 28.29